Sectional steam-boiler



(No Model.) 2 Sheets-Sheet 2.

A. M. DIMMIGK & E. Z. SMITH. SEOTIONAL STEAM BOILER.

No. 376,371. Patented Jan. 10, 1888.

qwihwweo l o 1 'mlfozd fad/2 M 7 UNITED STATES PATENT OFFIG.

ALBERT MELLVILLE DIMMIOK AND ELMER Z. SMITH, OF WILKES-BARBIE,PENNSYLVANIA.

.SECTIONAL STEAM-BO|LER.

SPECIFICATION forming part of Letters Patent No. 376,371, dated January10, 1888.

Application filed April 6, 1887. Serial No. 233,922. (No model.)

To all? whom, it may concern:

Be it known that we, ALBERT MnLLvILLn DIMMIOK and ELMER Z. SMITH,citizens of the United States, residing at Wilkes-Barre,

in the county of Luzerne and State of Pennsylvania, have invented newand useful Improvements in Sectional Steam Boilers, of which thefollowing is a specification.

Our invention relates to an improvement in [O sectional steam-boilers;and it consists in the peculiar construction and combination of devices,that will be more fully set forth hereinafter, and particularty pointedout in the claims.

In the drawings, Figure 1 is partly an elevetion and-partly a verticallongitudinal sectional view of a sectional steam-boiler embodying ourimprovements. Fig. 2 is an end elevation of the same. Fig. 3 is avertical transverse sectional view taken on the line a; x of Fig. 1.

' A represents the setting, which is made of brick-work and forms thesupport for the boiler and the sides of the combustionchamher andash-pit of the furnace. The side walls of the setting have their upperportions on their opposing inner sides flared or inclined outwardly, asshown in Fig. 3.

B represents apair of mud-drums which extend the whole length of theboiler and bear against the inclined portions of the side Walls of thesetting. Each drum is provided at its upper side with anoutwardly-extending lateral flange plate, 0, which bears upon the up- 5per side of thebrickwall. It willbe observed by referring to Fig.3 thatthe muddrums are supportedin an inclined position,a'nd that the saidmud-drums form the sides for the combustion-chamber.

o drums are Semicylindrical in shape and are provided at their ends withopenings having caps D. The said caps project beyond the ends of theboiler and are screwed to the ends of the mud-drums, and are therebymade de- 5 tachable therefrom.

' The grate of the combustion-chamber is composed of a series ofparallel grate bars, E-

The furnace is provided with a combustion chamber at each end, and eachcombustionchamber has grate-bars E. By forming a com- The lower sides ofthe I bustio n-chamber at each end of'the furnace steam can be morereadily kept up in the boiler by feeding the fires alternately withfresh coal, thus keeping one fire blazing while the other has fresh coalput upon it.

F represents the series of headers of the boiler, which are equal inlength to the muddrums and are secured upon the upper sides of thelatter and communicate therewith through openings G. These headers areinclined toward each other, each being arranged at an angle oppositethat in which its snpporting mud-drum is secured. The outer sides of theheaders are formed of plates H, which are detachable and are secured inposition by 6 5 means of bolts I. By removing the said bolts the platesI-I may be taken from the outer sides of the headers, and thereby accessmay be obtained to the interiors thereof.

K and L represent two series of tubes which connect the headers,together, the said series of tubes being inclined in oppositedirections.

M represents a pair of water-drums, one of which is secured on the upperside of each series of headers. These water-drums commu- 5 nicate withthe upper ends of the headers through openings N, and the ends of theWaterdrums project beyond the front and rear walls of the setting andare provided with removable screw-caps O, which permit access to beobtained to the interiors of the water-drums.

P represents a steam-drum which is similar in construction to thewater-drums, but is larger in diameter than they, and is arranged abovethe water-drums and in avertical line midway between them.- Shortinclined pipes R connect the water-drums to the steam-drum, and the endsof the latter project through the front and rear walls of the settingandare provided with removable screw-caps S.

T. represents a metallic plate which is secured to the front end of theframe. The said plate has an opening, U, through which fuel may beplaced upon the fire, and a hinged X represents a safety-valve which isattached to the front end of one of the waterdrnms. The lever X of thesaid safety-valve is connected to the arm of the draft-regulator N bymeans ofa rod, Y.

Z represents a water-gage of usual construction, which is arranged onthe front side of the boiler. The lower end of this water-gagecommunicates with one of the watendrums, and the upper end of the gagecommunicates with the steam-drum, as shown at Fig". 2.

A represents a smokepipe which communicates with the rear end of thefurnace. In this smoke-pipe is pivoted a damper, B, the shaft or axis ofwhich, at one end, is provided with an arm, f".

D represents a rod which is attached to the arm 0 and extends throughand is connected with the leverarm Xof the safetywalre. By means of thisconstruction the draft-regulator and the damper will be closed when thesteampressnre is so great as to raise the lever-arm X of thesafety-valve, draft automatically.

Z represents a shell which forms the sides and top of the boiler-easeand ohnnects the end walls of the setting, and has its lower edgesresting upon the lateral flange-plates G of the mud'drums.

From the foregoing description it will he readily understood that byinclining the head ers toward each other and connecting them together bymeans of the series of tubes K and L, arranged in differentinclinations, a constant circulation of water will he maintainedthroughout all parts of the boiler. Mud and sediment in the water entersthe mud-drums and settles thereimand the latter may be cleared out fromtime to time, when necessary, by removing the caps D.

Particular stress is laid on the great freedom thus regulating; the

r tubes being arranged at different heights, as

tached to the upper sides of the mud'drums V and communicatingtherewith, the said headers being inclined toward each other, the0ppositelydnelined series of tubes K and L, connecting the headerstogether, the waterdrums arranged above the headers and communicatingtherewith, and the steam-drum connected to and communicating with thewaterdrums, substantially as described.

2. In a sectionalsteanrlioiler, the comhint tion of the mud-drums B,forming the sides of the combustionchamber, the series of headers F,attached to the drums and communicating therewith, and theoppositely-inclined series of tubes K L, connecting the headers, saidset forth.

8. In a sectional steam-boiler. the combine tion of the side walls ofthe setting, the oppositely-inclined mud-drums 13, forming the sides ofthe combustionchamber and having the laterally-pro}eeting plates 0 attheir upper sides bearing on the side walls of the setting, and the case75, having its lower edges beai ing on the plates 0, substantiallyasdeserihed.

In testimony that we claim the foregoing as our own we have heretoaffixed our sgnaturcs in presence of two witnesses.

ALBERT HELLVILLE DDUIICK. lllilllllt Z SMITH.

\Vitnessos:

E. \V. Knirn'runn, W. S. Parsons.

